<?php
if ($_GET['id_tinh'] == 'hcm') {
	echo
		"<select name='huyen' id='huyen'>
		<option value='0'> Chon huyen </option>
		<option value='1'>Quan 1</option>
		<option value='2'>Quan 2</option>
		</select>";
} else {
	echo
		"<select name='huyen' id='huyen'>
		<option value='0'>Chon huyen</option>
		<option value='tu'>Tân Uyen</option>
		<option value='ta'>Thuan An</option>
		</select>";

}

